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Define a set of constants to use as the "index" argument to sqlite3BtreeGetMeta and UpdateMeta. This makes some parts of the code easier to follow. (CVS 6709)

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FossilOrigin-Name: 6dbf4eca00f845baa7200aba421d0bc158ba96aa
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danielk1977
2009-06-03 11:25:07 +00:00
parent 50d654da3b
commit 0d19f7ac57
11 changed files with 107 additions and 112 deletions
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10
src/btree.c
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@@ -9,7 +9,7 @@
** May you share freely, never taking more than you give.
**
*************************************************************************
** $Id: btree.c,v 1.609 2009/05/28 11:05:57 danielk1977 Exp $
** $Id: btree.c,v 1.610 2009/06/03 11:25:07 danielk1977 Exp $
**
** This file implements a external (disk-based) database using BTrees.
** See the header comment on "btreeInt.h" for additional information.
@@ -6539,7 +6539,7 @@ static int btreeCreateTable(Btree *p, int *piTable, int flags){
** root page of the new table should go. meta[3] is the largest root-page
** created so far, so the new root-page is (meta[3]+1).
*/
rc = sqlite3BtreeGetMeta(p, 4, &pgnoRoot);
rc = sqlite3BtreeGetMeta(p, BTREE_LARGEST_ROOT_PAGE, &pgnoRoot);
if( rc!=SQLITE_OK ){
return rc;
}
@@ -6772,7 +6772,7 @@ static int btreeDropTable(Btree *p, Pgno iTable, int *piMoved){
#else
if( pBt->autoVacuum ){
Pgno maxRootPgno;
rc = sqlite3BtreeGetMeta(p, 4, &maxRootPgno);
rc = sqlite3BtreeGetMeta(p, BTREE_LARGEST_ROOT_PAGE, &maxRootPgno);
if( rc!=SQLITE_OK ){
releasePage(pPage);
return rc;
@@ -6913,7 +6913,7 @@ int sqlite3BtreeGetMeta(Btree *p, int idx, u32 *pMeta){
** access an autovacuumed database, then make the database readonly.
*/
#ifdef SQLITE_OMIT_AUTOVACUUM
if( idx==4 && *pMeta>0 ) pBt->readOnly = 1;
if( idx==BTREE_LARGEST_ROOT_PAGE && *pMeta>0 ) pBt->readOnly = 1;
#endif
/* If there is currently an open transaction, grab a read-lock
@@ -6945,7 +6945,7 @@ int sqlite3BtreeUpdateMeta(Btree *p, int idx, u32 iMeta){
if( rc==SQLITE_OK ){
put4byte(&pP1[36 + idx*4], iMeta);
#ifndef SQLITE_OMIT_AUTOVACUUM
if( idx==7 ){
if( idx==BTREE_INCR_VACUUM ){
assert( pBt->autoVacuum || iMeta==0 );
assert( iMeta==0 || iMeta==1 );
pBt->incrVacuum = (u8)iMeta;